SP486/SP487. Quad RS-485/RS-422 Line Drivers

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SP486/SP487 Quad RS-485/RS-422 Line Drivers RS-485 or RS-422 pplications Quad Differential Line Drivers Tri-state Output Control 40ns Typical Driver Propagation Delays 5ns Skew -7V to +12V Common

1 SP486/SP487 Quad RS-485/RS-422 Line Drivers RS-485 or RS-422 pplications Quad Differential Line Drivers Tri-state Output Control 40ns Typical Driver Propagation Delays 5ns Skew -7V to +12V Common Mode Output Range 100µ Supply Current Single +5V Supply Operation Pin Compatible with SN75172, SN75174, LTC486 and LTC487 DESCRIPTION The SP486 and SP487 are low-power quad differential line drivers meeting RS-485 and RS- 422 standards. The SP486 features a common driver enable control; the SP487 provides independent driver enable controls for each pair of drivers. oth feature tri-state outputs and a wide common-mode output range. SP486 and SP487 are available in a 16-pin SOIC package. Exar Corporation Kato Road, Fremont C,

2 SOLUTE MXIMUM RTINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. V CC...+7V Input Voltages Logic V to (Vcc + 0.5V) Drivers V to (Vcc + 0.5V) Driver Output Voltage...+/-14V Input Currents Logic...+/-25m Driver...+/-25m Storage Temperature C to +150 C Power Dissipation Plastic DIP...375mW (derate 7mW/ºC above +70ºC) Small Outline...375mW (derate 7mW/ºC above +70ºC) V CC = +5.0V +/-5%; typicals at 25 C; T MIN T T unless otherwise noted. M MX ELECTRICL CHRCTERISTICS PRMETERS MIN. TYP. MX. UNITS CONDITIONS DC Characteristics Digital Inputs DI, EN, EN, EN 1 /EN 2, EN 3 /EN 4 Voltage V IL 0.8 Volts Voltage V IH 2.0 Volts Input Current +/-2 µ V IN = 0V to V CC DRIVER OUTPUTS Differential Voltage 5 Volts I O = 0; unloaded Differential Voltage 2 Volts R L = 50Ω (RS-422); Figure 1 Differential Voltage Volts R L = 27Ω (RS-485); Figure 1 Change in Output Magnitude for Complementary Output state 0.2 Volts R L = 27Ω or 50Ω; Figure 1 Common Mode Output Voltage Volts R L = 27Ω or 50Ω; Figure 1 Change in Common Mode Output Magnitude for Complementary Output state 0.2 Volts R L = 27Ω or 50Ω; Figure 1 Driver Short Circuit Current V OH +/-250 m -7V V O +10V Driver Short Circuit Current V OL +/-250 m -7V V O +10V High Impedance Output Current +/-2 +/-200 µ V O = -7V to +10V POWER REQUIREMENTS Supply Voltage Volts Supply Current µ No load, output enabled Supply Current µ No load, output disabled Exar Corporation Kato Road, Fremont C, SP486_487_100_0616

3 V CC = +5.0V +/-5%; typicals at 25 C; T MIN T T unless otherwise noted. M MX ELECTRICL CHRCTERISTICS PRMETERS MIN. TYP. MX. UNITS CONDITIONS ENVIRONMENTL ND MECHNICL Operating Temperature, _C C Operating Temperature, _E C Storage Temperature C Package -_T C Characteristics 16-pin SOIC Maximum Data Rate 10 Mbps Propagation Delay, t PLH ns R DIFF = 54 ohms, C L1 = C L2 = 100pF; Figure 2 Propagation Delay, t PHL ns R DIFF = 54 ohms, C L1 = C L2 = 100pF; Figure 2 Differential Driver Skew 5 15 ns R DIFF = 54 ohms, C L1 = C L2 = 100pF; Figure 2 Driver Rise Time (t R ) 20 ns 10% to 90% Driver Fall Time (t F ) 20 ns 90% to 10% Driver Enable to output High ns C L = 100pF, Figures 3 and 5 (S2 closed) Driver Enable to output Low ns C L = 100pF, Figures 3 and 5 (S1 closed) Driver Disable from output High ns C L = 15pF, Figures 3 and 5 (S2 closed) Driver Disable from output Low ns C L = 15pF, Figures 3 and 5 (S1 closed) Exar Corporation Kato Road, Fremont C,

4 PIN FUNCTION SP486 Pin Function SP486 Pin 1 - DI 1 - Driver 1 Input - If driver 1 output is enabled, a logic 0 on DI 1 forces driver output DO 1 low and DO 1 high. logic 1 on DI 1 with driver 1 output enabled forces driver DO 1 high and DO 1 Pin 2 - DO 1 - Driver 1 output. Pin 3 - DO 1 - Driver 1 output. Pin 4 - EN - Driver Output Enable; Please refer to SP486 truth table (1). Pin 5 - DO 2 - Driver 2 output. Pin 6 - DO 2 - Driver 2 output. Pin 7 - DI 2 - Driver 2 Input - If driver 2 output is enabled, a logic 0 on DI 2 forces driver output DO 2 low and DO 2 high. logic 1 on DI 2 with driver 2 output enabled forces driver DO 2 high and DO 2 Pin 8 - GND - Ground. Pin 9 - DI 3 - Driver 3 Input - If driver 3 output is enabled, a logic 0 on DI 1 forces driver output DO 3 low and DO 3 high. logic 1 on DI 3 with driver 3 output enabled forces driver DO 3 high and DO 3 Pin 10 - DO 3 - Driver 3 output. Pin 11 - DO 3 - Driver 3 output. Pin 12 - EN - Driver Output Disable; Please refer to SP486 truth table (1). Pin 13 - DO 4 - Driver 4 output. Pin 14 - DO 4 - Driver 4 output. Pin 15 - DI 4 - Driver 4 Input - If driver 4 output is enabled, a logic 0 on DI 4 forces driver output DO 4 low and DO 4 high. logic 1 on DI 4 with driver 4 output enabled forces driver DO 4 high and DO 4 Pin 16 - Supply Voltage V Vcc +5.25V. Exar Corporation Kato Road, Fremont C, SP486_487_100_0616

5 SP487 PIN FUNCTION Pin Function SP487 Pin 1 - DI 1 - Driver 1 Input - If driver 1 output is enabled, a logic 0 on DI 1 forces driver output DO 1 low and DO 1 high. logic 1 on DI 1 with driver 1 output enabled forces driver DO 1 high and DO 1 Pin 2 - DO 1 - Driver 1 output. Pin 3 - DO 1 - Driver 1 output. Pin 4 - EN 1 /EN 2 - Driver 1 and 2 Output Enable; Please refer to SP487 truth table (2). Pin 5 - DO 2 - Driver 2 output. Pin 6 - DO 2 - Driver 2 output. Pin 7 - DI 2 - Driver 2 Input - If driver 2 output is enabled, a logic 0 on DI 2 forces driver output DO 2 low and DO 2 high. logic 1 on DI 2 with driver 2 output enabled forces driver DO 2 high and DO 2 Pin 8 - GND - Ground. Pin 9 - DI 3 - Driver 3 Input - If driver 3 output is enabled, a logic 0 on DI 1 forces driver output DO 3 low and DO 3 high. logic 1 on DI 3 with driver 3 output enabled forces driver DO 3 high and DO 3 Pin 10 - DO 3 - Driver 3 output. Pin 11 - DO 3 - Driver 3 output. Pin 12 - EN 3 /EN 4 - Driver 3 and 4 Output Enable; Please refer to SP487 truth table (2).. Pin 13 - DO 4 - Driver 4 output. Pin 14 - DO 4 - Driver 4 output. Pin 15 - DI 4 - Driver 4 Input - If driver 4 output is enabled, a logic 0 on DI 4 forces driver output DO 4 low and DO 4 high. logic 1 on DI 4 with driver 4 output enabled forces driver DO 4 high and DO 4 Pin 16 - Supply Voltage V Vcc +5.25V. Exar Corporation Kato Road, Fremont C,

6 Test Circuits R V OD R V OC Figure 1. Driver DC Test Load Figure 2. Driver Timing Test S1 OUTPUT UNDER TEST 500 ohms S2 VCC C L Figure 3. Driver Timing Test Load +3V DI 0V +V O V O V O 1/2V O f = 1MHz; t R <10ns, t F <10ns 1.5V 1.5V t PLH t PHL V DIFF = V() - V() 90% 90% 10% 10% t R t F 1/2V O Figure 4. Driver Propagation Delays +3V f = 1MHz; t R < 10ns ; t F < 10ns EN 1.5V 1.5V 0V t ZL t LZ 5V, 2.3V V OL Output normally LOW 0.5V, V OH 0V 2.3V t ZH Output normally HIGH 0.5V t HZ Figure 5. Driver Enable/Disable Timing Exar Corporation Kato Road, Fremont C, SP486_487_100_0616

7 DESCRIPTION The SP486 and SP487 are low power quad differential line drivers meeting RS-485 and RS-422 standards. The SP486 features active high and active low common driver enable controls; the SP487 provides independent, active high driver enable controls for each pair of drivers. The driver outputs are short-circuit limited to 200m. Data rates up to 10Mbps are supported. The SP486 and SP487 are available in a 16-pin SOIC package. INPUT ENLES OUTPUTS DI EN EN OUT OUT H H X H L L H X L H H X L H L L X L L H X L H Hi-Z Hi-Z Table 1. SP486 Truth Table INPUT ENLES OUTPUTS DI EN 1 /EN 2 or EN 3 /EN 4 OUT OUT H H H L L H L H X L Hi-Z Hi-Z Table 2. SP487 Truth Table Exar Corporation Kato Road, Fremont C,

8 Exar Corporation Kato Road, Fremont C, SP486_487_100_0616

9 ORDERING INFORMTION Model Temperature Range Package Types SP486CT-L... 0 C to +70 C pin SOIC SP486CT-L/TR... 0 C to +70 C pin SOIC SP486ET-L C to +85 C...16-pin SOIC SP486ET-L/TR C to +85 C...16-pin SOIC SP487CT-L... 0 C to +70 C pin SOIC SP487CT-L/TR... 0 C to +70 C...16-pin SOIC SP487ET-L C to +85 C pin SOIC SP487ET-L/TR C to +85 C...16-pin SOIC Note: /TR = Tape and Reel revision history DTE REVISION DESCRIPTION June Legacy Sipex Datasheet June Update ordering information per PDN and convert to Exar Format Notice EXR Corporation reserves the right to make changes to any products contained in this publication in order to improve design, performance or reliability. EXR Corporation assumes no representation that the circuits are free of patent infringement. Charts and schedules contained herein are only for illustration purposes and may vary depending upon a user's specific application. While the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. EXR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless EXR Corporation receives, in writting, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized ; (b) the user assumes all such risks; (c) potential liability of EXR Corporation is adequately protected under the circumstances. Copyright 2011 EXR Corporation Datasheet June 2011 For technical support please Exar's Serial Technical Support group at: serialtechsupport@exar.com Reproduction, in part or whole, without the prior written consent of EXR Corporation is prohibited. Exar Corporation Kato Road, Fremont C,

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